Maybe it could fit in a seat bag? It’s about 6” wide by 8” long and 2” thick. Actual measurements are less than that. I don’t have a seat bag yet. I’m thinking that would be too big. I would just want to put a tube, tire levers, a tool, batteries, lights, and computer in it. Wrap it around my belt loop? I haven’t tried that. Maybe that’s too ghetto or make me feel lopsided or too heavy for the loop? I had it on my frame but it scratches it.